CVE-2023-34225
Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.
NVD · uneditedIn JetBrains TeamCity before 2023.05 stored XSS in the NuGet feed page was possible
Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.
dbcve analysis · moderate confidenceStored cross-site scripting (XSS) vulnerability in the NuGet feed page of JetBrains TeamCity versions prior to 2023.05 allows authenticated attackers to inject malicious JavaScript that executes in the browsers of other users viewing the NuGet feed.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.
NVD · CPE data< 2023.05CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.
From the vector- Attack vector
- Network
- Complexity
- Low
- Privileges
- Low
- User interaction
- Required
- Scope
- Changed
- Confidentiality
- Low
- Integrity
- Low
- Availability
- None
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.
dbcve checksWork through these to decide whether this CVE applies to you.
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Verify TeamCity is installedCheck if the TeamCity web interface is accessible or look for TeamCity processes (teamcity-server, TeamCity) running on the systemAffected if TeamCity is present and running
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Check TeamCity versionAccess TeamCity Administration > Diagnostics > About page, or check the version.txt file in the TeamCity installation directory, or query the TeamCity REST API endpoint /app/rest/server/versionAffected if The installed version is less than 2023.05 (for example, 2023.04.x, 2022.x, or earlier)
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Confirm NuGet feed is enabledNavigate to the NuGet feed URL on your TeamCity instance (typically /app/nuget/feed or /app/nuget/v3/index.json) or check in Administration > NuGet Feed > SettingsAffected if The NuGet feed page loads successfully and is accessible to authenticated users
You are affected if your TeamCity version is below 2023.05 and the NuGet feed functionality is enabled and accessible to authenticated users.
Generated from the published advisory. Verify against your own configuration.
Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.
dbcve · scoped2023.05
Upgrade TeamCity to version 2023.05 or later which contains the patched version. If immediate upgrade is not feasible, restrict access to the NuGet feed functionality to trusted users only.
2023.05
- 1. Back up your existing TeamCity data directory and database before proceeding with the upgrade.
- 2. Download TeamCity 2023.05 or later from the official JetBrains website (www.jetbrains.com/teamcity/download).
- 3. Stop the TeamCity server and all running build agents.
- 4. Install the new TeamCity version, preserving the existing data directory configuration.
- 5. Start the TeamCity server and verify the upgrade was successful by logging into the web interface.
- 6. Confirm the NuGet feed functionality works correctly after the upgrade.
Generated from the published advisory — verify against the referenced sources before acting.
- Consultation2.0 h
- Implementation4.0 h
- Testing4.0 h
- Review / QA2.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $3,328.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2023-34225 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2023-34225 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
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A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.
- Verified mitigations, workarounds, and config changes
- Version or environment caveats, and links to real fixes
- No weaponised exploit code, or anything meant to cause harm
- No spam, self-promotion, credentials, or personal data